How to measure TIA input current signal?

[yolande_yj]

It is a high frequency transimpedance amplifier, input signal is 500MHz. and the input current signal is small.

How to generate and measure the input current signal?

thanks

 

[suria3]

Can you clearly define on what measurement you are talking about. Your questions is not fully understandable.

 

[seanyang]

Basicly the differentail pair input current is zero. But you still can see the femto order or pico order current. Actually we don't care it . You sure you really want do it?[/img]

 

[pixel]

I dont know what exactly you need, but noise level has to be small.